When to plant
Plant bare-root Astilbe in early to mid-spring once the soil has warmed, or in early autumn so the roots can establish before winter. Avoid planting in frozen or very dry soil, as Astilbe prefers consistent moisture.
Where to plant
Choose a partially shaded to shaded spot with moist, humus-rich soil. Astilbe grows exceptionally well along pond edges, in woodland gardens or in mixed borders where soil remains evenly moist. Avoid hot, dry, full-sun sites unless soil moisture can be maintained.
Preparing the soil
Loosen soil to 20–25 cm deep and work in plenty of compost or other organic matter. Astilbe prefers fertile, moisture-retentive but well-drained soil. Improve sandy soil with generous organic matter, and lighten heavy clay with compost.
Preparing the plants
Soak bare-root Astilbe in lukewarm water for 15–20 minutes to rehydrate the roots before planting. Trim only damaged roots and handle the crown gently.
Planting the plants
Dig a hole large enough to spread the roots naturally. Plant the crown so it sits just below soil level, about 2–5 cm deep. Space plants 30–45 cm apart depending on the variety. Firm soil gently and water thoroughly after planting.
After planting
Keep the soil evenly moist during the establishment period. Apply a mulch of compost or bark around the plants to retain moisture and suppress weeds, keeping mulch away from the crown.
During growth
Water regularly, especially during dry spells—Astilbe does not tolerate drought. Apply an organic fertiliser or compost in spring to encourage strong foliage and flowering. Remove spent flower plumes to tidy the plant or leave them for autumn and winter interest.
After flowering / end of season
Cut back faded foliage to ground level in late autumn or early winter. In cold climates, apply a light mulch to protect crowns. Astilbe is hardy and will reshoot in spring.
Extra tips
Astilbe pairs beautifully with hostas, ferns, heuchera and hydrangea. For the best flower colour and leaf quality, maintain consistent moisture and avoid planting in dry, exposed sites.
